Endocrine Abstracts

Phaeochromocytoma is a rare adrenal tumour and patients usually present with palpitations, headaches, labile blood pressure and uncontrolled hypertension. Diabetes mellitus can occasionally be the presenting feature of pheochromocytoma due to catecholamine induced hyperglycaemia. We report a patient who presented with headaches and dizziness to the emergency department who was diagnosed with Type 1 diabetes incidentally following a random venous glucose of 41.6 mmol/l, capillary ketones of 2.1 mmol/l and positive GAD antibodies (101IU/ml). Following initiation of insulin, she experienced significant glucose variability and hypoglycaemia which led to further investigations and the diagnosis of sporadic phaeochromocytoma. The patient underwent laparoscopic adrenalectomy within 3 months of the diagnosis of Type 1 Diabetes. Following adrenalectomy, she continued to experience hypoglycaemia resulting in complete withdrawal of insulin. She continues to remain euglycaemic without any glucose lowering medications for more than 15 months following the adrenalectomy with a HBA1c of 37 mmol/mol and normal glucose readings indicative of remission Type 1 diabetes following the adrenalectomy.